Martel Electronics BetaGauge 321A - Manual (Page 40)

VAL?
Returns the value of any measurement taking place on the upper and lower display.
For example, if the upper display is measuring 5mA, and the lower display is
measuring 10V, then VAL? will return:
5.000000E-03, A, 1.000000E+01, V
ZERO_MEAS
Zeroes the attached pressure module. Enter the zeroing value in PSI after the
command when zeroing an absolute pressure module.
ZERO_MEAS?
Returns the zero offset or the reference value for absolute pressure modules.
HART_ON
Turns Hart mode on.
HART_OFF
Turns Hart mode off.
HART?
Returns status of Hart mode, ON or OFF.
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