Helmer QuickThaw DH2 User Manual (English)

Other manuals for Helmer QuickThaw DH2

Questions and Answers:

A
Amanda MitchellAug 4, 2025
What to do if Helmer Laboratory Equipment shows 'E1' high temperature alarm?
- K
  Kristina ChenAug 4, 2025
  If the 'E1' high temperature alarm appears on your Helmer Laboratory Equipment, here's what you can do: First, ensure the plasma thawer setpoint is below the high temperature alarm setpoint with at least a 1.0 °C difference. Also, make sure the chamber has water, as an empty chamber can trigger the alarm quickly. Check the power to the heater and heater triac. If necessary, replace the heater, heater triac, temperature control sensor, temperature controller, or control board, depending on where the fault lies. Finally, check all connections from the control board to the temperature controller and temperature control sensor, securing them if needed.
W
wsandersAug 11, 2025
What to do if Helmer QuickThaw DH2 Laboratory Equipment shows 'E2' lift-out system malfunction?
- J
  Joseph MorganAug 11, 2025
  If you see an 'E2' error (lift-out system malfunction) on your Helmer Laboratory Equipment, try the following: First, reset the electronics by turning the power off for 10 seconds, then back on, and press the LIFT OUT button. For DH8 models, visually compare the faulty lift-out system with a working one to identify any loose parts blocking movement. Check the connections from the control board to the terminal strip, and from the terminal strip to the lift-out motor, lift-out motor capacitor, and microswitches, securing any loose connections. Also, check the fuse on the circuit board and replace it if it's blown. If the issue persists after these steps, further assistance may be needed.
N
Nicole WillisAug 19, 2025
What to do if Helmer Laboratory Equipment shows '.nPt' and 'FAiL'?
- E
  Emily WashingtonAug 19, 2025
  If your Helmer Laboratory Equipment is displaying '.nPt' and 'FAiL' alternately on the temperature controller, the issue may stem from a faulty connection between the temperature controller and the temperature control sensor, or a faulty part. Check the connections between these components, ensuring they are secure. If the problem continues, consider replacing either the temperature control sensor or the temperature controller.

Helmer QuickThaw DH2 Specifications

General

Brand	Helmer
Model	QuickThaw DH2
Category	Laboratory Equipment
Language	English

Summary

Safety

Safety Labels

Identification of safety-related labels present on the thawer, including hazard and ground terminal warnings.

Avoiding Injury

Guidelines for safe operation, maintenance, and handling to prevent personal injury during equipment use.

Components

Front and Sides Overview

Identification and description of components located on the front and sides of the thawer, including ports and labels.

Control Panel

Detailed overview of the control panel elements, including indicator LEDs, buttons, and displays for operation.

Chamber and Rear Components

Identification of chamber features and rear-mounted components such as vents, power connectors, and circuit breakers.

Thawer Basket Assembly

Description of the thawer basket, including its parts like bearings, dividers, and security snaps for holding plasma bags.

Installation

Location Requirements

Criteria for selecting a suitable environment for installing the plasma thawing system, including surface and access needs.

Powering On the Unit

Step-by-step instructions for connecting the power cord and turning on the plasma thawing system.

External Thermometer Installation

Guidance on optional installation of an external thermometer for monitoring thaw cycles.

Technical Specifications

Details on input voltage, power consumption, circuit breakers, weight, dimensions, interior volume, and operating conditions.

General Operation

Filling the Chamber

Procedure for filling the thawing chamber with water to the appropriate level for optimal thawing.

Thaw Time Guidelines

Information on expected thaw times based on plasma bag type, size, and whether they were frozen flat or folded.

Loading Plasma Bags

Instructions for safely loading plasma bags into the thawer baskets, including precautions for the lift-out system.

Overwrap Bag Usage

Explanation of why overwrap bags are necessary and how to properly use them with plasma bags and security snaps.

Agitation Control

How to enable or disable the agitation function, which affects thaw time, via switches on the rear of the unit.

Starting and Pausing Thaw Cycles

Steps for initiating, pausing, resuming, and completing a plasma thawing cycle using the control panel buttons.

Draining the Chamber

Procedure for safely draining water from the thawing chamber, including connecting the drain tube and disconnecting power.

Removing Baskets

Instructions for safely removing the thawer baskets from the lift-out arm, emphasizing caution when the basket is not loaded.

Maintenance Schedule

Routine Maintenance Tasks

Schedule for regular cleaning and checks of the chamber, exterior, fan, moving parts, and bearings.

Calibration and Alarm Checks

Procedures for verifying temperature calibration and testing the high temperature alarm system as part of maintenance.

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Helmer QuickThaw DH2 User Manual

Table of Contents