4 Proof Test Procedure
4.2.2 Zero gas and mA output
1) Apply zero gas to the sensor
2) The current output should be 4.0 +/- 0.1 mA (default setting). If the mA output is not at the toler-ance when applying zero gas,
perform a zero gas calibration per 6.15.2 (mV input sensor) and 6.15.3 (mA input sensor) of 3011M5001. Otherwise, please
contact Honeywell Analytics for further services.
3) It should be careful when use with mA input sensor. mA input sensor may produce incorrect mA signal to Touchpoint Plus’s mA
channel. Please verify if mA input sensor generates the accurate mA signal to Touchpoint Plus. For example, user can connect mA
loop calibrator (accurate source of mA signal) to the mA channel of Touchpoint Plus. Then, user can verify if mA sensor generates
incorrect output or Touchpoint Plus’s mA channel produces incorrect mA output.
4.2.3 Span gas and mA output
1) Apply calibration gas to the sensor
2) The mA output measured is related to the percentage of gas applied. For example, As a default setting, 100 % of full gas
concentration is equivalent to 20.0 mA. If 75% of the full scale gas concentration is applied, the mA output should be 16.0 mA
per the default setting.The acceptable tolerance is +/- 0.1 mA. If the tolerance is out of +/- 0.1 mA, refer to 6.15.2 (mV input
sensor) and 6.15.3 (mA input sensor) of 3011M5001 and complete a span gas calibration procedure. Otherwise, please contact
Honeywell Analytics for further services
4.2.4 Verification of mA output configuration
mA output is configurable to each of Touchpoint Plus status (e.g. Normal, inhibit, over-range, under-range and fault). Users can
check if Touchpoint Plus’s mA output is identical to user’s mA configura-tion setting.
1) Normal and under/over range: Gas test using a zero and calibration gas – zero gas and calibration gas test shall show the mA
output per zero gas configuration and calibration gas, respectively. This process shall be same as section 4.2.2 and 4.2.3 of this
manual but the target mA value shall be user’s configuration value +/- 0.1 mA.
2) Inhibit and fault: When Touchpoint Plus is inhibit mode when menu mode is started. When Touch-point Plus stays in menu mode,
user can check if mA output is identical to inhibit setting value. mA output for fault status can be verified by simulating the fault
status, e.g. disconnect the sensor. The mA output at inhibit and fault status shall be the target value of configuration value +/- 0.1
mA.
If any of the mA output at each status is out of tolerance, please check the mA output value configu-ration. Otherwise, please
contact Honeywell Analytics.
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