Measurement Specialties 9116 User Manual

Pressure Systems, Inc.                                                                                        Model 9116 User’s Manual 
 
 

 

Page 94 

 

www.PressureSystems.com 

Following is a simple, step-by-step procedure for executing a Re-zero calibration of a Model  
9116 Intelligent Pressure Scanner. Optional commands are shown within brackets [ ]. 

Model 9116 Command 

Disable automatic valve shifting after module power up. 
Ensure valves in RUN/CAL mode (default) 

[w0B01] 

[w1200] 

…  normal data acquisition 

 

Apply 0.0 psi differential  to the module CAL and CAL REF 
inputs. 

 

Place the module calibration manifolds into the CAL position 
[if w0B01 command executed in Step 1] 

w0C01 

Delay for settling of pneumatic inputs 

 

Verify that measured data reads near expected zero value 

[rFFFF0] 

Instruct module to calculate new offset coefficients for all 16 
channels of Model 9116 

hFFFF 

Place calibration manifold back into the RUN position [if 
w0B01 command executed in Step 1] 

[w0C00] 

Store new offset coefficients to transducer nonvolatile 
memory 

[w08] 

… continue normal data acquisition 

 

 

Calibration 

 
For improved accuracy, Model 9116 Intelligent Pressure Scanners are capable of 
independently performing a transducer calibration function, referred to as Span adjustment (or 
simply Span Cal).  Actually, there is a provision to supply any suitable “upscale” pressure (e.g., 
actual transducer full-scale) during such a calibration adjustment.  The Span adjustment 
calibration will result in a recalculated “gain” coefficient for each channel being calibrated, to 
compensate for any transducer or module gain errors.  For best results, a Re-zero calibration 
should be performed before performing a span calibration. Also, note that a  new and improved 
Multi-Point Calibration function exists.  This function integrates the separate calibration 
functions (for Re-zero and Span adjustment described in Section 4.2 and this section) into a 
single function that adjusts both “offset” and “gain” coefficients at the same time, using two or 
more calibration points. Details of using this improved calibration function are described in 
Section 4.4.