Technical Specifications

Number of Channels 4
Current Polarity Bipolar
Measuring Ranges (Standard version) RNG0: ± 120 µA
RNG1: ± 120 nA
Current Resolution RNG0: 15 pA
RNG1: 15 fA
Sampling Frequency - FS up to 100 kHz
Analog Bandwidth - BW 5 kHz
Equivalent Input Current Noise (@ 1kHz) RNG0: 1 ppm/FS
RNG1: 6 ppm/FS
Equivalent Input Current Noise (@ 100kHz) RNG0: < 5 ppm/FS
RNG1: < 25 ppm/FS
Temperature Coefficient - TC RNG0: < 0.001 %/FS/°C
RNG1: < 0.0015 %/FS/°C
High Voltage Source 500 V or -500V @ 1 mA (standard)
configurable up to 4kV or -4kV
High Voltage Noise + Ripple (typical) < 1 mVRMS
< 3 mVPK-PK
Communication Interface 10/100/1000 Ethernet TCP-IP
External Signals Configurable Trigger/Gate
Trigger Output
External Interlock
Input Connectors BNC
High Voltage Connector SHV
Extra Communication Interface SFP - Small Form-Factor Pluggable
Additional Features Firmware Remote Update
Configurable Firmware Sampling Frequency
High Voltage Readout
High Voltage Current Readout
High Voltage Over-Current Protection
BEST Integration
Input Voltage Supply +12 V
Weight 800 g
Mechanical Dimensions 175 × 175 × 44 mm

Ordering Options

Product code Description Ordering Code
TETRAMM - NO HV 4-channel Fast Interface Bipolar Picoammeter without Integrated HV Source WTETRAMMNOHV
TETRAMM +500 V 4-channel Fast Interface Bipolar Picoammeter with Integrated +500V HV Source WTETRAMM05PX
TETRAMM -500 V 4-channel Fast Interface Bipolar Picoammeter with Integrated -500V HV Source WTETRAMM05NX
TETRAMM +2 kV 4-channel Fast Interface Bipolar Picoammeter with Integrated +2kV HV Source WTETRAMM20PX
TETRAMM -2 kV 4-channel Fast Interface Bipolar Picoammeter with Integrated -2kV HV Source WTETRAMM20NX
TETRAMM +4 kV 4-channel Fast Interface Bipolar Picoammeter with Integrated +4kV HV Source WTETRAMM40PX
TETRAMM -4 kV 4-channel Fast Interface Bipolar Picoammeter with Integrated +4kV HV Source WTETRAMM40NX
TETRAMM - C001 4-channel Picoammeter with Integrated -500V HV (RNG: ±1.2 uA, ±1.2 nA, BW=100 Hz) WTETRAMMC001
TETRAMM - C002 4-channel Picoammeter with Integrated +500V HV (RNG: ±1.2 mA, ±1.2 uA) WTETRAMMC002
TETRAMM - C003 4-channel Picoammeter w/out Integrated HV (RNG: ±25 uA, ±250 nA) WTETRAMMC003
TETRAMM - C004 4-channel Picoammeter with Integrated +500V HV (RNG: ±120 uA, ±120 nA, BW=20 kHz) WTETRAMMC004
TETRAMM - C005 4-channel Picoammeter with Integrated -500V HV (RNG: ±10 uA, ±125 nA) WTETRAMMC005
TETRAMM - C006 4-channel Picoammeter without Integrated HV (RNG: ±10 uA, ±2 uA) WTETRAMMC006
TETRAMM - C008 4-channel Picoammeter with Integrated +500V HV (RNG: ± 6 mA BW = 2 kHz, ± 20 μA BW = 1 kHz) WTETRAMMC008
TETRAMM - C009 4-channel Picoammeter with Integrated ±30V bias (RNG: ±20 uA, ±2 uA, BW=1 kHz) WTETRAMMC009
TETRAMM - C010 4-channel Picoammeter with Integrated ±30V bias (RNG: ±120 uA BW = 20 kHz, ±120 nA BW > 5 kHz) WTETRAMMC010

Immagine del prodotto

4-channel simultaneous sampling at 24-bit, 100 kHz for best-in-class noise performances in the evaluation of the beam position

The CAEN ELS TetrAMM - e.g. "Tetra AMMeter" - is a 4-channel picoammeter device dedicated to accurate and fast low current measurements.

The presence of a fast Gigabit Ethernet Interface and an SFP (Small Form-factor Pluggable) link allow for very high-throughput data acquisition. Each channel is sampled independently and simultaneously at a maximum frequency of 100 kHz with a 24-bit resolution.

The integrated Bias Voltage source, ranging from a full-bipolar ±30 V version to factory-configurable high-voltage output rating and polarity, can be used to bias the connected detecting system. Bias Voltage output ratings, beside the bipolar ±30 V model, are 500V or -500V, 2 kV or - 2 kV and 4 kV or -4 kV (polarity is factory-configurable only).

Immagine del prodotto

Integrated low-noise bias voltage source for detector biasing. CAEN High-Voltage technology is integrated into this device for the High-Voltage models

The Bias Voltage integrated module is equipped with output voltage and current readbacks, as well as with protection features against over-current, thus protecting the detecting system from excessive power drawing.

On-board processing of data allows to obtain measurements on a user-defined sampling period, with minimum time steps of 10 µs.

Input trigger/gate signals are present on coaxial connectors and are configurable, thus allowing to synchronize the TetrAMM acquisition of the device to an external event.

Small mechanical dimensions are kept as in the previous AH401D and AH501D series in order to install the device as close as possible to the current sensor/detector and to minimize possible environmental noise pick-up. The TetrAMM device is the perfect replacement/upgrade for the AH501D bipolar picoammeter.

Immagine del prodotto

TetrAMM Oscilloscope software is included in order to have a ready-to-go measuring setup

The CAEN ELS Oscilloscope software series allows customers to obtain instant and accurate results after connecting the TetrAMM device directly to the detector.
Different configurations for detector geometry, measuring range, sampling rate and other parameters can be configured directly via this free software.

  • 4-channel simultaneous sampling
  • Up to 100 kHz sampling frequency (per channel)
  • 24-bit A/D conversion
  • Different bipolar current ranges (check for different models)
  • 10/100/1000 TCP-IP Interface
  • SFP Interface
  • Low-noise integrated Bias Voltage Source (±30 V bipolar or High-Voltage monopolar)
  • External Trigger/Gate and Interlock signals
  • Firmware Remote Update
  • Configurable sampling frequency
  • Auto-Ranging functionality
  • Real-time FPGA and soft-processor computations
  • Compact mechanical dimensions
  • Low-Noise AC/DC power supply included
  • TetrAMM Oscilloscope for quadrature phBPM applications

Documentation Software/Firmware
TetrAMM - Product Presentation Last update: 2019-10-22 13:54:35

TetrAMM Oscilloscope - Quick Start Guide v.1.2 Last update: 2018-01-11 13:33:07

TetrAMM - User's Manual v2.6 Last update: 2022-11-23 15:42:07

Application Note - AN-2001 - Quadrature Detector Readout rev1.0 Last update: 2020-02-03 15:07:46

CAEN ELS - Device Manager File Repository 0 MB

TetrAMM Firmware (3.2.4) Last update: 2021-05-05 07:07:46
1.26 MB

TetrAMM Oscilloscope (1.4.2) Last update: 2019-05-13 13:50:50
200.46 MB

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