JPH0579866A - Apparatus for adjusting measuring instrument - Google Patents

Abstract

PURPOSE:To automate adjustment of a converter part without using a communication function and without causing a drop in normal operation functions. CONSTITUTION:A program exclusively used for adjustment is incorporated into a CPU 1 provided on a converter part A separately from a normal program, and at the time of adjustment, this adjustment program is used to transmit/receive signals to/from a jig B for adjusting the converter part. The jig is constituted so that it can perform setting of a simulated input value betafor outputting to the converter part A, switching of kinds of the simulated inputs, or confirmation and determination of an analog output gamma after adjustment from the converter part A, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a so-called residual chlorine meter, for example, a so-called input / output unit, which performs a predetermined arithmetic processing based on a signal from an external detector to obtain the value of the input signal. For the instrument (hereinafter referred to as the "converter section") configured to instruct / display, or to output the processing result to an external instrument, etc., the adjustment at the time of manufacturing the converter section is required. The present invention relates to a meter adjusting device which is a combination of a converter part and an adjusting device (hereinafter referred to as “jigs”) configured corresponding to the converter part so as to perform automatically.

[0002]

2. Description of the Related Art The converter unit has, for example, an arithmetic unit (hereinafter referred to as "CPU") which incorporates a normal program and controls the functions of the entire instrument. A key matrix for externally setting and inputting conditions and information necessary for the calculation of this CPU, a relay (RL) that operates by a signal from the CPU to output a contact signal, and an external CPU And an input section provided for guiding an input signal from the sensor (for example, a detection signal from a detection terminal provided outside), and a CP
The output unit and the like are provided for outputting the result of the arithmetic processing in U to an external instrument or the like.

In order to inspect or adjust such a converter part at the time of manufacturing or factory shipment, a jig is usually used as a jig and a semi-fixed resistor is used as a hardware. Has been.

[0004]

However, such means has a problem that it is unsuitable for automatic adjustment because the adjustment work of turning the trimmer of the semi-fixed resistor is required.

In order to solve this, as a jig and tool,
A calculation adjustment means is conceivable in which the adjustment data is written in the storage means and a predetermined adjustment is performed by software by using the written data.

At first glance, it seems that such means can be automatically adjusted, but it has the following problems.

[0007] Generally speaking, it is necessary to exchange data by communication between the converter unit side and the jig / tool side. However, in most cases, the converter does not have a communication function for this purpose.

In such a case, it is almost impossible to mount the communication function because of the structure of the converter section, such as the area of the printing plate. For this reason, as a practical matter, this adjusting method cannot be applied to the structure of the converter section having no communication function.

In addition, since the communication function is not necessary during normal use, adding such a function only for factory adjustment before shipment also increases the cost of the apparatus itself. .. In addition, adding software for controlling the communication function may deteriorate the performance of the main function, in other words, the normal operation function.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is that it is not necessary to provide the above-mentioned communication function in the converter, (EN) Provided is an instrument adjusting device capable of automatically adjusting the converter section without causing deterioration of the operation function.

[0011]

In order to achieve the above object, the present invention inputs a calculation unit for controlling the functions of the entire instrument by incorporating a normal program, and conditions and information necessary for the calculation of the calculation unit. Key matrix for operating, a relay for operating a contact signal to output a contact signal by the signal of the arithmetic unit, an input unit provided for guiding an input signal from the outside to the arithmetic unit, and arithmetic processing performed by the arithmetic unit In a measuring instrument comprising an output unit for outputting the result to the outside, (a) a special adjustment program is built in the arithmetic unit (1) in addition to the normal program, and a switching element for switching between the normal program and the special adjustment program When the switching element is switched to the adjustment-dedicated program side as in (6), the relay is transmitted by the signal from the arithmetic unit (1) based on the adjustment-dedicated program.
(2) An instrument (A) configured to output an adjustment-dedicated contact signal α corresponding to an instruction for adjustment, and (b) a instrument provided corresponding to this instrument for adjusting the instrument. I / O circuit that reads and outputs the contact signal α for adjustment (7)
, An input section (11) for reading and outputting the output γ from the output section (3) of the instrument, decoding signals from the I / O circuit and the input section, and making necessary judgments to adjust the instrument Calculation control section (8), a key operation mechanism (12) for mechanically performing key operation of the key matrix (5) of the instrument based on the signal of the calculation control section, and the calculation Based on the signal from the control unit, the simulated input value β is input to the input unit (4) of the instrument.
And a device for adjustment (B) comprising a simulated input value generating section for outputting the signal, and the adjustment of the instrument can be automatically performed based on the exchange of signals between these instruments and the device for adjustment. It is characterized by being able to do so.

[0012]

Operation: The relay contacts provided for adjusting the zero and span of the converter and the CPU built in the converter are used. That is, a special adjustment program is separately installed in the CPU in addition to the normal program, and the switching between the normal program and the special adjustment program is performed by using the switching element. At the time of switching, the relay contact is controlled by a signal based on an adjustment dedicated program from the CPU (that is, an operation different from the relay operation during normal operation is performed). The data on the converter side (relay) is generated by the operation of this relay contact.
The ON / OFF pattern of is a contact signal for data / adjustment corresponding to an instruction to the jig / tool for adjustment) is output to the tool / tool side.

A jig is provided corresponding to the converter part for adjusting the converter part.

This jig / tool is equipped with a computer or the like for processing the command of the data so that the data (dedicated contact signal for adjustment) from the converter side can be decoded or In order to perform each processing for adjustment work, the I / O circuit reads the data and outputs it to the arithmetic control unit, and the output from the output unit of the converter unit is read by the input unit to the arithmetic control unit. The operation control unit which outputs and outputs the respective signals from the I / O circuit and the input unit decodes the signal contents and outputs a signal for adjusting the converter unit by making a necessary judgment. .. Based on the signal from this arithmetic control unit, the key operation mechanism mechanically operates the key matrix of the converter unit, and the simulated input value generation unit is connected to the input unit of the converter unit. It is configured to output a simulated input value.

That is, this jig / tool sets the simulated input value (adjustment signal) to be output to the converter section and switches the type of the simulated input, and after the adjustment from the converter section. The configuration is such that it is possible to check and judge the analog output, etc. At this time, the data for notifying the setting change of the input value to the converter side should be operated by the operation of the key matrix provided to confirm the operation of each part provided in the converter part. Becomes Therefore, the problems of the above-mentioned conventional techniques are solved without significantly improving the converter unit, and the converter unit is adjusted based on the exchange of signals between the converter unit and the jig. Can be done automatically.

[0016]

Embodiments of the present invention will now be described with reference to the drawings.
This will be described with reference to FIG. FIG. 1 is a diagram showing a specific embodiment of the present invention.

In FIG. 1, A is a converter section and B is a jig.

In the converter unit A, 1 is a CPU (arithmetic unit) which incorporates a normal program and an adjustment dedicated program to control the entire converter unit, and 2 is a controller based on the adjustment dedicated program from the CPU 1. A relay (R that outputs data (on / off pattern signal) α to jig / tool B by operation with a signal (an operation different from normal operation)
L), 3 is an output unit that outputs a signal from the CPU 1, 4 is an input unit that inputs a simulated input value (adjustment signal) β from the jig B, 5 is a key matrix, 6 is a normal program and adjustment dedicated A switching element (SW) provided for switching to and from the program.

The jig B comprises an I / O circuit 7, a CPU (arithmetic control unit) 8, a simulated signal generating unit 9 and a simulated signal switching unit 10 for outputting simulated input values to the input unit of the converter unit. Simulated input value generation section (the following description is performed as simulated signal generation section 9 and simulated signal switching section 10), input section 11, and key
The operating mechanism 12 can be used.

At this time, the I / O circuit 7 reads the on / off pattern data corresponding to the instruction from the converter unit A to the jig based on the relay operation. on the other hand,
The input unit 11 is composed of, for example, a digital voltmeter which reads the output γ from the converter unit A and outputs the read data to the CPU 8 (hereinafter, this input unit will be referred to as "D").
"VM").

The CPU 8 receives a signal from the I / O circuit 7 and the DVM 11, decodes the content of the signal, and performs necessary processing. That is, by decoding the data input to the jig B, the simulated input value β is output to adjust the converter unit A (control or judge based on the data). A control signal for operating the key matrix 5 is supplied with a simulated signal generation section 9, a simulated signal switching section 10, and a key operation mechanism.
Output to 12.

The simulated signal generator 9 controlled by the CPU 8 has a reference value (for example, a reference value required for the converter A).
Reference voltage value and reference resistance value equivalent to 0 and 100%)
Can be output as a simulation signal.
The simulated signal switching unit 10 switches the simulated signal from the simulated signal generation unit 9 based on the control signal from the CPU 8,
Output as simulated input value β.

The key operation mechanism 12 is a key for the converter unit A.
The key operation of the matrix 5 (the operation for the operation is represented as Ki here) can be mechanically performed. As a result, the data for notifying the setting change of the input value to the converter side A can be performed by operating the key matrix 5.

The CPUs 8 to DVM 11 described above do not need to be independently installed as shown in the figure, and set different simulated input values such as setting of simulated input values and voltage and resistance values. It goes without saying that any structure can be used as long as it is possible to confirm and judge the analog output after the adjustment from the converter, etc. Nor. As a result, all adjustments of the converter section can be performed automatically.

The adjusting operation of such a configuration is as follows.

(A): In the converter unit A, the switching element 6 is switched to the activation of the adjustment-dedicated program, and then the power of the converter unit is turned on. With a special adjustment program,
In the CPU1, the LCD (not shown) segments are all lit for a few seconds, the default value is written in the EEPROM (not shown), the relay 2 is operated to adjust the zero and span, and is turned on. A 1 ”/ OFF“ = 0 ”pattern signal (specifically,“ 0011 ”for zero adjustment and“ 0100 ”for span adjustment) α is output to the jig B. First, it is assumed that zero adjustment is performed.

(A): In the jig B, "001
The 1 ”pattern signal causes the CPU8 to generate a simulated signal generator.
9 / Simulation input value β for zero adjustment of simulation signal switching unit 10
(0.0 ° C, 1000.0Ω for resistance output)
Is output to the converter unit A. When the input stabilization wait time of the converter unit is set to several seconds, after the waiting time, the above 100
In order to notify the input of the resistance value of 0.0 Ω to the converter section, the CPU 8 controls the key operation mechanism 12 to cause Ki to read the key matrix 5 such as "Y".
The ES "key is pressed.

(A): In the converter section A, "zero" is displayed when the "YES" key of the key matrix 5 is pressed.
Get data into CPU1.

(B) After this adjustment is completed, span adjustment is performed.

(C): The CPU 1 operates the relay 2 for the span adjustment and outputs the pattern signal α of "0100" to the jig / tool B.

(C): In tool B, "010
The 0 "pattern signal causes the CPU8 to generate a simulated signal
9 / Simulated signal switching unit 10 is used to convert the simulated input value β (100.0 ° C, 1385.0Ω) for span adjustment to converter unit A.
Output to. After the input stabilization wait time of the converter unit, in order to inform that the converter unit has input the resistance value output of 1385.0Ω, the key operation mechanism 12 is controlled in the same manner as described above to perform the key matrix operation. Press the 5 “YES” key.

(C): In the converter section A, when the "YES" key of the key matrix 5 is pressed, the "span" data is taken in by the CPU1.

(D) With the above, the CPU 1 performs the calculation for adjustment. Adjustment completed.

(E) The relay 2 is operated from the CPU 1 to output the pattern signal α of “0000” to the jig B, and the jig B is in the state at the end of the adjustment, that is, 138
The resistance value output state of 5.0Ω is maintained.

(F) In the converter part A, as a result of calculating the input location, it is determined whether or not it is in the range of 100.0 ° C. ± □□ ° C. (this allowable range is predetermined), and the error If it is within the range, the process proceeds to the next process (g). If it is out of the range, the process returns to the process (a) and the adjustment work is performed from the beginning.

(G): The relay 1 is operated from the CPU 1 to output the pattern signal α of “0011” to the jig B, and in the jig B, the CPU 8 causes the simulated signal generator 9 /
The simulated signal switching unit 10 is set to 1000.0Ω (0.0 ° C) and output to the converter unit A. After the input stabilization wait time of the converter section (several seconds), the key operation mechanism 12 is controlled to notify the input of the resistance value output of 1000.0Ω to the converter section. "YE
Press the S "key.

(G): In the converter section A, when the "YES" key of the key matrix 5 is pressed, the CPU 1 calculates the input resistance value output of 1000.0Ω and the result is If it is within the error range, the process proceeds to the next step (h). If it is out of the range, the above ( Return to the process of b) and perform the adjustment work from the beginning.

(G): The confirmation is completed as described above.

(H): Next, the output signal is adjusted.

(H): The converter 2 operates the relay 2 to output the pattern signal α of "0111" to the jig B, and in the jig B, the CPU 8 causes the simulated signal generator
9 / The simulated signal switching unit 10 is output as a current to the converter unit A. And at this time, the output section of the converter section A
Input the output signal γ from 3 and monitor it.

(H): That is, in jig B, CP
U8 scans the simulated signal generating section 9 / simulated signal switching section 10 so that the converter output signal γ for the simulated input value β is 0.
% (For example, 4 mA). Simulated input value β
When the output signal γ is driven to 0%, the key operation mechanism 12 is operated to inform the converter unit of that fact, and the "YES" key of the key matrix 5 is pressed.

(H): The converter unit A is
When the "S" key is pressed, the "0%" data is taken into the CPU1 and the process proceeds to the next (i) step.

(I): The converter 2 operates the relay 2 to output the pattern signal α of “1000” to the jig B, and in the jig B, this time with respect to the simulated input value β. The converter output signal γ is 100% (eg 20 m
When the output signal γ is controlled to 100%, the key operation mechanism 12 is used to perform the key matrix.
Press the “YES” key of 5.

(Re): The converter unit A is "YES".
When the key is pressed, "100%" data is taken into the CPU1 and the process proceeds to the next (le) step.

(I): With the above, the adjustment at this stage is completed.

(E) Next, the contents adjusted as described above are confirmed.

(L): The CPU 1 outputs the output signal γ corresponding to 100% regardless of the simulated input value β, and outputs the pattern signal α of "1001".

(L): In jig B, "100"
The output signal γ of the converter unit A is read by the pattern signal α of 1 ″, and 100% ± ΔΔ (for example, 20.00 ± 0.
02mA) range. Output signal γ
If is within the error range, press the key operation mechanism 12 and press the “YES” key on the key matrix 5. If it is out of the range, the key is pressed.
Use the operating mechanism 12 and press the "NO" key on the key matrix 5.

(L): In the converter section A, if the “YES” key of the key matrix 5 is pressed, the process proceeds to the next step (W), and if the “NO” key is pressed, the above (A) is pressed. ) Return to the process and perform adjustment work from the beginning.

(2): The CPU 1 outputs the output signal γ corresponding to 0% regardless of the simulated input value β, and "1".
A pattern signal α of 010 ″ is output.

(Wo): In tool B, "101
The output signal γ of the converter unit A is read by the pattern signal α of 0 ″, and 0% ± ΔΔ (for example, 20.00 ± 0.02
Determine whether it is within the (mA) range. If the output signal γ is within the error range, operate the key operation mechanism 12 and press the “YES” key on the key matrix 5, and if it is out of the range, operate the key operation mechanism 12 and operate the key matrix 5 on the key matrix 5. Press the "NO" key.

(W): In the converter section A, if the “YES” key of the key matrix 5 is pressed, the process proceeds to the next step (W), and if the “NO” key is pressed, the above (A) is pressed. ) Return to the process and perform adjustment work from the beginning.

(W): The confirmation is completed as described above.

(W) When the above confirmation and adjustment are completed, the switching element 6 of the converter unit A is switched to set the operation of the CPU 1 to the normal operation. Therefore, during adjustment, the relay contact is controlled in a form that is adjusted for adjustment so that the operation that is different from the relay operation during normal operation is performed. -Part A can be used as usual for the meter.

[0055]

Since the present invention is constructed as described above, it has the following effects. (B) In equipment that does not have a communication function, by using the relay contact as an interface with the host computer, a separate adjustment-dedicated program is provided in place of the communication function to add to the normal operation. It is possible to perform automatic adjustment by avoiding the above and combining with a jig. (B) If the device is equipped with a relay contact and is equipped with a microprocessor, the automatic adjustment system can be easily realized by applying the present invention.

[Brief description of drawings]

FIG. 1 is a diagram showing a specific example of the present invention.

[Explanation of symbols]

 A converter unit (instrument) B jig (tool for adjustment)

Claims (1)

[Claims] 1. An arithmetic unit for incorporating a normal program to control the functions of the entire instrument, a key matrix for inputting conditions and information necessary for the arithmetic operation of the arithmetic unit, and an operation unit operated by signals from the arithmetic unit. An instrument comprising a relay for outputting a contact signal, an input unit provided for guiding an input signal from the outside to the arithmetic unit, and an output unit for outputting the result of arithmetic processing by the arithmetic unit to the outside, wherein the arithmetic unit An adjustment-dedicated program is built into the (1) separately from the normal program, and the switching element (6) is used to switch between the normal program and the adjustment-dedicated program. A switch configured to output an adjustment-dedicated contact signal α corresponding to an instruction for adjustment from the relay (2) by a signal based on the adjustment-dedicated program from the arithmetic unit (1) when switched to (A), an I / O circuit (7) provided corresponding to this instrument for adjusting the instrument, which reads and outputs the adjustment-dedicated contact signal α, and an output section (3) of the instrument Output γ
An input section (11) for reading and outputting, an arithmetic control section (8) for decoding the signals from the I / O circuit and the input section and making a necessary judgment to output a signal for adjusting the instrument, A key operation mechanism (12) for mechanically performing a key operation of the key matrix (5) of the instrument based on the signal of the arithmetic control unit, and an input unit (of the instrument based on the signal of the arithmetic control unit ( Four)
And a device for adjustment (B) comprising a simulated input value generator for outputting a simulated input value β, and adjusting the instrument based on the exchange of signals between these instruments and the device for adjustment. An instrument adjusting device characterized in that it can be automatically performed.