The Evolution of the DRUCK UPS Loop Calibrator
UPS4E
Loop Calibrator
- Measure or source 0 to 24 mA
- Accuracy: 0.01% of reading + 1 digit
- Dual display of mA and %, linear or as flow
- Test modes: Step, Span, Valve test, Ramp
- Measurement of 30 V DC and continuity test
- Storage of 100,000 readings
- Integrated 250-ohm resistor for HART protocol support
- 24 V DC loop power during mA measurement or sourcing
- Automatic shutdown to preserve battery life
→ PRODUCT Datasheet
UPS4E is a rugged and ultra-compact loop calibrator designed for single-handed operation. It is an essential tool for testing and powering mA control loops and mA devices in process automation. Ideal for instrument maintenance – with a clearly readable display and easy-to-use functions like step, span, and valve testing that save time.
UPS4E uses advanced electrical calibration technology to provide a reliable and cost-effective calibrator for current loops.
| General Technical Specifications | |
|---|---|
| Internal memory | 100,000 data points (data logging) |
| Operating temperature | -10 to 50 °C |
| Storage temperature | -20 to 70 °C |
| Ingress protection | IP54: Protection against dust and splashing water |
| Relative humidity | 0 to 90 % RH, non-condensing |
| Shock/Vibration | MIL-PRF-28800F Class 2 |
| EMC | EN 61326-2-03 |
| Electrical safety | EN 61010-1:2010, EN 61010-2-030:2012 |
| Enclosure material | High-impact ABS |
| Loop resistance high | Primary reading flashes on error |
| Out-of-range reading | “—” flashing on display |
| Approvals | CE marked |
| Display | 72 × 42.5 mm, custom segmented display |
| Dimensions (L × W × H) | 145 mm × 73 mm × 25 mm |
| Weight | 300 g including batteries |
| Power supply | 4 × 1.5 V AA alkaline batteries |
| Battery life | Up to 72 h (measure mode), up to 18 h at 12 mA loop current |
| Auto power-off | After 10 minutes without key press (can be disabled) |
| Battery status | 4-segment battery symbol |
| Electrical terminals | 2 gold-plated 4 mm sockets |
| HART resistor | Optional 250 Ohm loop resistor |
| Connectivity | USB-C for data transfer and firmware updates |
DRUCK UPS-2
DRUCK UPS-3
DRUCK UPS-4E
Display
The graphical display is high-contrast with backlight and shows both the primary measurement and the percentage of the full-scale value.
0 to 24 mA – Measure or Source
Internal 24 V loop supply available in both measurement and source mode – ideal for system shutdowns.
- In source mode, the current is actively regulated by the device.
- In measurement mode, the current is provided by the connected device.
Simultaneous Percentage Display
Displays both mA and percentage values based on either 4–20 mA or 0–20 mA ranges.
Step, Span, and Valve Testing
Quickly perform linearity tests and zero/span adjustments. The valve mode allows seat testing and actuator setup.
| Mode | 0% | 25% | 50% | 75% | 100% |
|---|---|---|---|---|---|
| 4–20 mA linear | 4 | 8 | 12 | 16 | 20 |
| 0–20 mA linear | 0 | 5 | 10 | 15 | 20 |
| 4–20 mA flow | 4 | 5 | 8 | 13 | 20 |
| 0–20 mA flow | 0 | 1.25 | 5 | 11.25 | 20 |
| 4–20 mA span check | 4 | 20 | |||
| 0–20 mA span check | 0 | 20 | |||
| 4–20 mA valve | 3.8, 4, 4.2 | 12 | 19, 20, 21 | ||
| 0–20 mA valve | 0, 0.2 | 10 | 19, 20, 21 |
Auto-Step and Ramp
Adjustable step/ramp rate (1–599 seconds) for one-handed testing of loops, valves, and actuator behavior.
Measurement Ranges & Accuracy
| Function | Range | Resolution | Accuracy (1 year) % of reading + counts |
|---|---|---|---|
| mA output with external loop power | 20 mA | 0.001 | ±0.01% of reading + 1 count |
| 24 mA | 0.001 | ±0.01% of reading + 2 counts | |
| mA measurement with external loop power | ±20 mA | 0.001 | ±0.01% of reading + 1 count |
| ±24 mA | 0.001 | ±0.01% of reading + 2 counts | |
| mA output with internal loop power | 20 mA | 0.001 | ±0.01% of reading + 1 count |
| 24 mA | 0.001 | ±0.01% of reading + 2 counts | |
| mA measurement with internal loop power | 20 mA | 0.001 | ±0.01% of reading + 1 count |
| 24 mA | 0.001 | ±0.01% of reading + 2 counts | |
| Voltage output | ±20 V | 0.001 | ±0.01% of reading + 2 counts |
| Voltage measurement | ±30 V | 0.001 | ±0.01% of reading + 2 counts |
(1) Accuracy includes temperature effects from 10 °C to 30 °C (50 °F to 86 °F).
For use outside this range, add 0.003 %/°C (0.015 %/°F).
“Fast Set” Output
Precise setting of values to 0.001 mA. Ideal for alarm trip testing.
30 VDC Measurement
For loop diagnostics and maintenance of voltage-controlled devices.
Data Logging
Stores over 100,000 data points. Logging can be activated manually via the display, with adjustable intervals. Data can be exported to a PC for further analysis.
Additional Information:
- Standard AA batteries
- Supports inrush current up to 40 mA for 500 ms
- Battery status indicator
- Information screen: serial number, software version, calibration date
- PIN-protected calibration and firmware updates
Druck UPS4E Product Features
