AMETEK 7330 Pro-Stik II - Manual (Page 8)

8
Equipment Return
In order to provide prompt and reliable service, any
equipment being returned for repair or credit, must be
pre-approved by the factory.
You must have a Returned Material Authorization
Number! To obtain a Returned Material
Authorization (RMA#), contact your distributor.
Please provide the following information:
• Model Number of returned equipment
•
Serial Number
• Original Purchase Order Number
•
Detailed description of the failure
• Contact Name and Phone Number
In many applications, the probes are exposed to
hazardous materials. It is your responsibility to fully
disclose all chemicals and decontaminate the entire
product.
• OSHA mandates that our employees be informed
and protected from hazardous chemicals.
• A Material Safety Data Sheet (MSDS) listing any
hazardous material to which the probe has been
exposed MUST accompany any return.
Gain Control
The internal signal gain is set at the factory and should
not need to be adjusted in the field. However, if the
output signal is unstable (i.e. the output goes to 3.8mA
with the float in place), or the probe is being applied in
a high temperature application, the internal signal gain
may be re-set as follows:
Manual Setting of Gain
1. Place the float near the end of the probe.
2. Power down the probe.
3. Short the White “program” wire to the Black “Loop –”
wire and apply power with the wires shorted.
4. Output goes from 12mA to 20mA if successful.
5. Output will go to 3.8mA if gain setting failed.
6. Power down the probe and remove the short
between the White “program” wire and the Black
“Loop –” wire.
Diagnostics and Symptoms
1. Float magnet is outside of the programmed span
a. Beyond 4mA set point is indicated as 3.9mA.
b. Beyond 20mA set point is indicated as 20.1mA.
2. Loss of signal, sensor failure, or float outside active
range (top or bottom) is indicated as 3.8mA.
Symptom Troubleshooting Tip
No signal received at
controller
• Check that power is applied to controller
• Check wiring connection to probe
Output is 3.8mA • Be sure float retention clip is in place at base of
probe and float is installed
• Be sure float is in active region and not stuck in Null
or Dead Zone
• Reset Gain
• Check temperature of process. Cannot be greater
that 230ºF (110ºC)
Output appears erratic • Be sure probe is mounted perpendicular with
gravity
• Check float for free movement along probe
• Reset Gain
Output appears to be
going down, yet tank
is filling
• Check configuration of 4mA & 20mA points
Output appears to be
going up, yet tank is
emptying
• Check configuration of 4mA & 20mA points
Output is not scaled
properly
• Re-set both Zero (4mA) and Span (20mA) points.
Panel Meter error • Check to see if the panel meter being used is
“confused” by an output of less than 4mA or more
than 20mA. 3.9mA, 3.8mA or 20.1mA are diagnostic
outputs and should be used for alarms.
(All diagnostic values with tolerances +0.02mA)
7. Apply power, the probe will return in normal 4 to
20mA mode with the new gain set.
8. If the signal does not return to normal, and the
problem was not solved, contact your distributor.
Optional Push Button Setting of Gain
1. Place the float near the end of probe.
2. Power down the probe.
3. Hold down the Zero button and apply power.
4. Output goes from 12mA to 20mA if successful.
5. Output will go to 3.8mA if AGC failed.
6. Power down the probe and release the Zero button.
7. Apply power, the probe will return in normal 4 to
20mA mode with the new gain set.
8. If the signal does not return to normal, and the
problem was not solved, contact your distributor.
Additional Information
See addendum information for sanitary and flex probe
installation instructions.
7330 Sanitary 3A Probes Data Sheet Z157
7330 316 Stainless Steel Probes Data Sheet Z154
7330 PVDF Flex Probes Data Sheet Z177
Flex Probe Installation & Handling Procedure Z190