Discontinued becuase of parts obsolense as of July 2024
Replaced by the more accuracte easier to use 1888
CLICK HERE FOR THE 1888 Megohmeter
IET can still calibrate and repair most issues
The 1865 + Megohmmeter/IR tester, with digital display, is used for high accuracy measurements of insulation resistance on a wide variety of components, materials and electronic devices. Resistance values greater than 100 teraohms can be measured with a basic accuracy of 0.5% at DC voltages up to 1000V.
A programmable limit makes the megohmmeter ideal for pass/fail testing in a production environment and is also adaptable for use in automated system applications with its included RS-232 Interface or optional IEEE-488 interface.
Precision Measurements: The IET Labs 1865 + Megohmmeter provides resistance measurement capability from 1kΩ to 100TΩ (test voltage dependent) with a basic accuracy of 0.5%. To meet test requirements for a wide range of devices, the test voltage is fully programmable up to 1000V DC. Sensing the proper resistance measurement range is done automatically, thus eliminating setup errors; and in order to eliminate lead or fixture errors, the operator can easily initiate an automatic zeroing routine of test leads.
Easy to use: The 1865+'s menu programming system is significantly improved, simple controls and indicators combine for efficiency of test and productivity. Its multi-function keypad provides the operator with an easy way to program and make measurements.
Pass/Fail Testing: Measured results are automatically compared to an operator programmed limit for pass/fail testing. Pass/Fail indicator lights or a pass/fail output from the megohmmeter I/O interface provide a clear indication of the measured results.
Program and Data Storage: Test setup conditions and measured results of the megohmmeter can be stored in CSV format for easy use with Microsoft Excel. Storage options include:
- *512 MB of internal instrument memory,
- *A computer (via the IEEE interface)
- *A flash drive (via the USB port)
- *New programs can also be uploaded via the IEEE interface or the USB port.
Automated Testing: For automated system applications, the 1865+ Megohmmeter includes an I/O interface connection with remote start and pass/fail outputs. An optional IEEE-488 interface is also available (or can be added later), which enables the 1865 to be remotely controlled by a computer.
Resistance or Current Display Mode: Besides a readout of insulation resistance in ohms, the operator can select a display mode for reading the measured current directly .
Safety Features: The 1865 + Megohmmeter provides safety features such as current limiting, a warning indicator when high voltage is active, and safety interlock, all for protection of the operator.
Component Test Fixture: An accessory fixture is available for use with the 1865+ Megohmmeter which accommodates a variety of component types, including radial, axial and chip components. Its shielded case reduces electrical noise and interference and includes a cover interlock switch and remote start for maximum operator safety.
Why Buy?
- *For precision high resistance measurements over a wide voltage range
- *For automated testing requiring remote start and pass/fail output
- *To data log test results via RS-232, Flash Drive or IEEE-488 interface
Product Package
The following accessories come standard with the megohmmeter:
- 150073 1865 Instruction Manual
- 4200-0300 AC Power Cable
- 800014/15 Capacitor Adapters (100kΩ & 1MΩ)
- 520049 Power Line Fuse (2.5A, 250V)
- 630019 Interlock Connector
- Calibration Certificate Traceable to NIST
1865+ Megohmmeter Basic Specifications (Full specifications can be found on datasheet)
Resistance range: 1 kΩ (103 Ω) to >100 TΩ (1014 Ω)
No of ranges: 7 manually settable plus auto-ranging
Voltage range: 1 to 1,000 volts, programmable in two ranges
Voltage accuracy at front panel connectors:
1 - 100 V: 1% of setting + 1% Resolution: 25 mV
100 - 1,000 V: 1% of setting + 2 % Resolution: 250 mV
Resistance accuracy: ±[0.45% +{(RX/VX)(0.0005FS + 2pA) + 30Ω/RX}100%]:
RX = Measured resistance in ohms
VX = Programmed voltage in volts
FS = Full scale current range in amperes
Measuring current: 0.1 pA (10-13 A) to 1 mA (10-3 A)
Current accuracy at front panel connectors:
1 nA to 1 mA ±[0.5% + (0.0005 FS + 2 pA)]
100 pA to 1 nA ±[1% + (0.0005 FS + 2 pA)]
1 pA to 100 pA ±[10% + (0.0005 FS + 2 pA)]
Short-circuit current:<2 mA
Input impedance: 5 kΩ, ±5%
Output voltage impedance: 1 kΩ, ±5%
Measurement limits: Pass/Fail (1 limit)
Interfaces: Standard: RS-232, I/O port with safety interlock Optional: IEEE-488 & Data/Program storage via USB port
Input terminals: Four sheathed banana jacks, front-mounted (with optional rear-mounting) + unknown (red) - unknown (black) guard (blue) ground (green)
