Dwyer ISDP - Manual (Page 15)

ZERO and SPAN (Calibration of Zero and Span) SUB MENUS
The lower display reads CAL in this mode.
ZERO Calibration
NOTE: For accurate calibration, DO NOT apply any pressure when performing
this function.
With the display reading ZERO , press the ENTER key. The upper display will blink.
Press ENTER again to complete the zeroing of the instrument or press the MENU
key to cancel.
SPAN Calibration
With the display set to SPAN , apply full scale pressure to the unit. Press the ENTER
key. The upper display will blink. Press ENTER again to complete the calibration or
press the
MENU key to cancel.
Maintenance
Upon final installation of the Series ISDP intrinsically Safe Differential Pressure
Transmitter, no routine maintenance is required. The Series ISDP is not field serviceable
and should not be returned if repair is needed (field repair should not be attempted and
may void warranty). Be sure to include a brief description of the problem plus any rele-
vant application notes. Contact customer service to receive a return goods authorization
number before shipping.
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