Equipment Repair Service

Whether it is a flow meter or a sampler issue we provide onsite troubleshooting and repair service. We stock common repair parts and can help you get back online ASAP.

ISCO Signature Open

Having some preliminary information is the first step in getting ready to eliminate the issue. Planning for troubleshooting visit helps us tentatively identify faulty parts and bring them with us onsite to consequently restore your equipment back to operating condition.

Teledyne ISCO 4700/5800 Samplers

Sampler screen indicating temperature sensor problem

This sampler display indicates that the evaporator temperature sensor has gone bad and both sensors need to be replaced. To find this screen you need to go into the Run Diagnostics.
To start the diagnostics from the Main Menu screen:
1. Select the CONFIGURE option and press Enter.
2. Press the Previous arrow until the RUN DIAGNOSTICS
option is displayed. Press Enter.
3. Select the REFRIG TEMPERATURE option and press Enter.

Sampler screen indicating proper work of the temperature sensors

When this test is started, the sampler will display the temperature until you press the Stop or Enter button. There is no pass or fail. This test simply provides continuous temperature monitoring and cooling/heating. 
The screen here shows temperatures after the temperature sensors have been replaced and the Air temperature is on the way to reaching the target temperature.

Sampler forced air fan

Forced air fan when it stops working can also cause the sampler to not cool properly due to very poor air exchange between the refrigeration sled evaporator and the sampler bottle. You can determine if the fan is running by reaching inside and putting your hand in front of the fan to feel air flow.  

Sampler refrigeration sled

Sampler refrigeration sled may need to be replaced if the compressor has gone bad. When we replace temperature sensors we check how quickly the Evap temperature drops. If in over 5-7 minutes the Evap temperature has not dropped chances are the refrigeration sled is not working. The picture here shows a properly working refrigeration sled with frost rising from the bottom coils to the top.


10633 County Road 26
Blair, NE 68008


Phone: (402) 571-1303
Fax: (402) 502-6662