64
(1) Make wiring according to the diagram below.
Connect DC power supply (power source), digital voltmeter (measuring device), standard
resistance and HHC (Hand Held Communicator):
When current is measured with an ammeter connected to CK+ and CK- terminals, the internal
resistance of the ammeter should be 12
Ω
or less.
(2) Calibration of output circuit (D/A)
Calibrate the output circuit with reference to “Calibration of output circuit” (page 20) in “AD-
JUSTMENT ”.
Load resistance
Standard resistance
DC power supply
Digital voltmeter
HHC
Important
For communication with the HHC, a load resistor of 250
Ω
is necessary.
Calibration procedure
(3) Zero/span adjustment
Refer to “Zero/span adjustment” (page 35) in Section 7.
(4) Accuracy test
Apply input pressures in the order of 0%, 25%, 50%, 75%, 100%, 75%, 50%, 25% and 0%,
and read output at each input pressure.
Make sure the difference between each output value and input pressure (%) is within the
accuracy rating listed in the table below.
The voltage values in the table are dependent on use of “DC power standard resistor
250
Ω
+ digital voltmeter (measuring device).
Measurement category
Reference value
Accuracy
Accuracy:0.1% Accuracy:0.2%
Percent display (%)
0, 25, 50, 75, 100
±
0.1
±
0.2
Current measurement (mA)
4, 8, 12, 16, 20
±
0.016
±
0.032
Voltage measurement (V)
1, 2, 3, 4, 5
±
0.004
±
0.008
